Drink coaster



FIG. 1 is a top perspective view of a drink coaster showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof; and,

FIG. 4 is a side elevation view thereof, the remaining sides being identical.

Dashed lines represent score lines. 

The ornamental design for a drink coaster, as shown and described. 